Its not that easy. Removing 2 million skilled workers can cause alot of damage to saudi itself. Not to forget we can also pull out thousands of military trainers and missiles placed in saudi, hundreds of saudi cadets studying in Pakistan, plus the many defence pacts signed to protect saudi. You have no idea how much iran wants pak saudi relations to be disrupted.
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https://www.arabnews.com/node/953306/saudi-arabia
JEDDAH: More than 1.6 million Pakistanis proceeded to Saudi Arabia between 2011 and 2015 for employment purpose, making the country the largest market for Pakistani workers across the world.
This makes up 49.9 percent of Pakistanis who went abroad seeking jobs, according to the Ministry of Overseas Pakistanis and Human Resource Development.
Nearly 1.3 million people (38.2 percent) proceeded to UAE for employment during the same period.
Oman was the third largest importer of Pakistani manpower and 0.26 million (7.6 percent) job-seekers proceeded to Oman during 2011-2015, Pakistani media quoted a ministry official as saying.
The illiterate and unskilled workers comprises around half of the total Pakistani migrant workers and only 1.76 percent workers are doing white collar jobs, the official said.
Among the skilled workers, drivers are in the highest number, followed by masons, carpenters and tailors.
Since 1971 till Dec. 2015, around 8.77 million Pakistanis proceeded abroad for employment through the Bureau of Emigration and Overseas Employment (BEOE).
Out of this total manpower exports, about 96 percent have proceeded only to Gulf Cooperation Council (GCC) countries, one percent to European countries and three percent to other countries for employment during the same period.